[aprssig] FEMA - APRS data mining...

Brian Webster info at wirelessmapping.com
Sat Sep 10 07:40:52 CDT 2016

It would be interesting if you could take that data and draw polygons or contour lines based on the data values, much like the isobar lines on weather maps. This could be done for wind speed, temperature, rainfall and barometric pressure.


Thank You,

Brian N2KGC


From: aprssig [mailto:aprssig-bounces at tapr.org] On Behalf Of spam8mybrain
Sent: Thursday, September 08, 2016 9:42 PM
To: Robert Bruninga; TAPR APRS Mailing List
Subject: Re: [aprssig] FEMA - APRS data mining...


Hi, Bob.


You just gave me a good enhancement idea for the next build of YAAC.


YAAC already supports filtering for traffic containing weather data. I'm going to augment that so it could filter data based on wind speed (ex.: only show stations reporting wind speed in excess of X mph, X user-specified). YAAC already can plot weather stations using the old-style wind-barb symbols in place of the UIView WX icon (user-selected), so it already has an easy visual of stations in very windy areas.


P.S. YAAC is one of those programs that color-codes stations by the APRSdos statuses and by Mic-E status (simultaneously), and supports all of the extended symbol overlays you have defined. It also has been tested connected to FireNet with a range filter covering the entire North American continent and it can keep up with the data rate.


I hope this is the kind of info you're looking for.


Andrew Pavlin, KA2DDO 

author of YAAC 

-------- Original message --------
From: Robert Bruninga <bruninga at usna.edu> 
Date: 9/8/16 8:50 PM (GMT-05:00) 
To: TAPR APRS Mailing List <aprssig at tapr.org> 
Subject: [aprssig] FEMA - APRS data mining... 

FEMA Technical Office would like to mine APRS data for better field data.  The main thing they want is a better way to SEE big pictures concepts quickly..  


For a decade, FEMA uses the "Waffle house index" they get from Waffle house to show in RED, YELLOW, GREEN, NORMAL coloring attributes on 1700 Waffle houses throughout hurricane zone so they can see instantly, the big picture of conditions.

See the FEMA Waffle index!

FEMA asked if APRS could do this...

FEMA thought that APRS only had a dozen symbols (They had been watching a D700 display only),  I pointed out that APRS has always had nearly 200 symbols each with up to 8 color attributes (only APRSdos displays the colors I think)..., but even those 200 were  expanded in 2008 or so to nearly 3000 of which over 135 have been defined but most clients have not painted them all in yet. 

This was done through overlays so that  they  are all backwards compatible on older systems as a base symbol with a letter overlay, but they can be fully painted out to be a whole new symbol as clients wish.

See: http://aprs.org/symbols/symbols-new.txt

APRSdos had these color attributes on every symbol but this layer was not implemented by most clients that just  use ICONs.  I believe some clients have implemented it, but I have not kept up.

Hessu was working on a common updated data base.... (how's that going?)

I asked the FEMA to tell me their top priority symbols and I would see how well they mapped to APRS symbols and get myself up to speed on where we are with symbols..

So, I am open for you APRS gurus to fill me in on any progress on symbols beyond what I have been tracking on http://aprs.org/symbols.html

Important people want to know...

bob, WB4aPR



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